./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/nsqmf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/nsqmf.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39aacadb1ef8d9484ed01fea6a4b942ae6d8d46b70aa8d3c1aaf631adea16a64 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 01:55:59,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 01:55:59,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 01:55:59,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 01:55:59,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 01:55:59,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 01:55:59,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 01:55:59,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 01:55:59,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 01:55:59,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 01:55:59,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 01:55:59,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 01:55:59,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 01:55:59,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 01:55:59,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 01:55:59,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 01:55:59,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 01:55:59,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 01:55:59,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 01:55:59,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 01:55:59,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 01:55:59,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 01:55:59,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 01:55:59,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 01:55:59,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 01:55:59,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 01:55:59,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 01:55:59,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 01:55:59,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 01:55:59,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 01:55:59,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 01:55:59,600 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 01:55:59,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 01:55:59,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 01:55:59,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 01:55:59,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 01:55:59,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 01:55:59,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 01:55:59,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 01:55:59,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 01:55:59,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 01:55:59,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 01:55:59,631 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 01:55:59,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 01:55:59,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 01:55:59,632 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 01:55:59,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 01:55:59,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 01:55:59,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 01:55:59,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 01:55:59,634 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 01:55:59,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 01:55:59,635 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 01:55:59,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 01:55:59,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 01:55:59,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 01:55:59,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 01:55:59,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 01:55:59,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 01:55:59,636 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 01:55:59,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 01:55:59,636 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 01:55:59,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 01:55:59,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 01:55:59,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 01:55:59,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 01:55:59,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 01:55:59,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 01:55:59,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 01:55:59,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 01:55:59,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 01:55:59,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 01:55:59,639 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 01:55:59,639 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 01:55:59,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 01:55:59,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 01:55:59,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39aacadb1ef8d9484ed01fea6a4b942ae6d8d46b70aa8d3c1aaf631adea16a64 [2021-12-17 01:55:59,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 01:55:59,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 01:55:59,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 01:55:59,884 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 01:55:59,886 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 01:55:59,887 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/nsqmf.c [2021-12-17 01:55:59,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23db8943/1fdf7688e78d4b5a8d335219f876996d/FLAG2ee1ea12d [2021-12-17 01:56:00,238 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 01:56:00,238 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqmf.c [2021-12-17 01:56:00,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23db8943/1fdf7688e78d4b5a8d335219f876996d/FLAG2ee1ea12d [2021-12-17 01:56:00,670 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23db8943/1fdf7688e78d4b5a8d335219f876996d [2021-12-17 01:56:00,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 01:56:00,674 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 01:56:00,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 01:56:00,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 01:56:00,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 01:56:00,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:56:00" (1/1) ... [2021-12-17 01:56:00,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16a79aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:56:00, skipping insertion in model container [2021-12-17 01:56:00,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:56:00" (1/1) ... [2021-12-17 01:56:00,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 01:56:00,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 01:56:00,841 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqmf.c[588,601] [2021-12-17 01:56:00,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 01:56:00,868 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 01:56:00,878 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqmf.c[588,601] [2021-12-17 01:56:00,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 01:56:00,905 INFO L208 MainTranslator]: Completed translation [2021-12-17 01:56:00,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:56:00 WrapperNode [2021-12-17 01:56:00,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 01:56:00,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 01:56:00,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 01:56:00,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 01:56:00,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:56:00" (1/1) ... [2021-12-17 01:56:00,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:56:00" (1/1) ... [2021-12-17 01:56:00,940 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2021-12-17 01:56:00,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 01:56:00,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 01:56:00,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 01:56:00,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 01:56:00,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:56:00" (1/1) ... [2021-12-17 01:56:00,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:56:00" (1/1) ... [2021-12-17 01:56:00,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:56:00" (1/1) ... [2021-12-17 01:56:00,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:56:00" (1/1) ... [2021-12-17 01:56:00,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:56:00" (1/1) ... [2021-12-17 01:56:00,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:56:00" (1/1) ... [2021-12-17 01:56:00,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:56:00" (1/1) ... [2021-12-17 01:56:00,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 01:56:00,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 01:56:00,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 01:56:00,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 01:56:00,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:56:00" (1/1) ... [2021-12-17 01:56:00,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 01:56:00,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:56:01,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 01:56:01,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 01:56:01,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 01:56:01,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 01:56:01,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 01:56:01,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 01:56:01,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 01:56:01,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 01:56:01,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 01:56:01,094 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 01:56:01,095 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 01:56:01,254 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 01:56:01,258 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 01:56:01,259 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 01:56:01,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:56:01 BoogieIcfgContainer [2021-12-17 01:56:01,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 01:56:01,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 01:56:01,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 01:56:01,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 01:56:01,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 01:56:00" (1/3) ... [2021-12-17 01:56:01,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c22d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:56:01, skipping insertion in model container [2021-12-17 01:56:01,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:56:00" (2/3) ... [2021-12-17 01:56:01,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c22d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:56:01, skipping insertion in model container [2021-12-17 01:56:01,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:56:01" (3/3) ... [2021-12-17 01:56:01,273 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqmf.c [2021-12-17 01:56:01,276 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 01:56:01,277 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 01:56:01,321 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 01:56:01,334 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 01:56:01,334 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 01:56:01,343 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:56:01,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 01:56:01,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:56:01,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:56:01,347 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:56:01,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:56:01,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-12-17 01:56:01,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:56:01,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590517946] [2021-12-17 01:56:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:56:01,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:56:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:56:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:56:01,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:56:01,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590517946] [2021-12-17 01:56:01,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590517946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 01:56:01,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 01:56:01,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 01:56:01,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434331324] [2021-12-17 01:56:01,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 01:56:01,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 01:56:01,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:56:01,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 01:56:01,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 01:56:01,497 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:56:01,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:56:01,508 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-12-17 01:56:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 01:56:01,510 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-17 01:56:01,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:56:01,514 INFO L225 Difference]: With dead ends: 38 [2021-12-17 01:56:01,514 INFO L226 Difference]: Without dead ends: 17 [2021-12-17 01:56:01,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 01:56:01,520 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:56:01,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:56:01,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-17 01:56:01,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-17 01:56:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:56:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-12-17 01:56:01,546 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-12-17 01:56:01,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:56:01,546 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-12-17 01:56:01,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:56:01,546 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-12-17 01:56:01,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 01:56:01,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:56:01,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:56:01,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 01:56:01,548 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:56:01,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:56:01,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-12-17 01:56:01,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:56:01,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247082929] [2021-12-17 01:56:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:56:01,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:56:01,594 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:56:01,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114108247] [2021-12-17 01:56:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:56:01,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:56:01,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:56:01,612 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:56:01,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 01:56:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 01:56:01,683 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 01:56:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 01:56:01,728 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 01:56:01,728 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 01:56:01,729 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 01:56:01,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 01:56:01,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:56:01,953 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-17 01:56:01,955 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 01:56:01,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 01:56:01 BoogieIcfgContainer [2021-12-17 01:56:01,976 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 01:56:01,977 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 01:56:01,977 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 01:56:01,977 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 01:56:01,977 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:56:01" (3/4) ... [2021-12-17 01:56:01,979 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-17 01:56:02,001 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 01:56:02,001 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 01:56:02,002 INFO L158 Benchmark]: Toolchain (without parser) took 1327.44ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 80.5MB in the beginning and 103.7MB in the end (delta: -23.2MB). Peak memory consumption was 3.1MB. Max. memory is 16.1GB. [2021-12-17 01:56:02,002 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 104.9MB. Free memory is still 61.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 01:56:02,002 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.64ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 80.2MB in the beginning and 108.0MB in the end (delta: -27.8MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2021-12-17 01:56:02,003 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.34ms. Allocated memory is still 132.1MB. Free memory was 108.0MB in the beginning and 106.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 01:56:02,003 INFO L158 Benchmark]: Boogie Preprocessor took 36.54ms. Allocated memory is still 132.1MB. Free memory was 106.5MB in the beginning and 105.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 01:56:02,003 INFO L158 Benchmark]: RCFGBuilder took 281.83ms. Allocated memory is still 132.1MB. Free memory was 105.1MB in the beginning and 94.9MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 01:56:02,004 INFO L158 Benchmark]: TraceAbstraction took 715.17ms. Allocated memory is still 132.1MB. Free memory was 94.3MB in the beginning and 105.8MB in the end (delta: -11.5MB). Peak memory consumption was 28.1MB. Max. memory is 16.1GB. [2021-12-17 01:56:02,004 INFO L158 Benchmark]: Witness Printer took 24.58ms. Allocated memory is still 132.1MB. Free memory was 105.8MB in the beginning and 103.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 01:56:02,005 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 104.9MB. Free memory is still 61.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 228.64ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 80.2MB in the beginning and 108.0MB in the end (delta: -27.8MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.34ms. Allocated memory is still 132.1MB. Free memory was 108.0MB in the beginning and 106.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.54ms. Allocated memory is still 132.1MB. Free memory was 106.5MB in the beginning and 105.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 281.83ms. Allocated memory is still 132.1MB. Free memory was 105.1MB in the beginning and 94.9MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 715.17ms. Allocated memory is still 132.1MB. Free memory was 94.3MB in the beginning and 105.8MB in the end (delta: -11.5MB). Peak memory consumption was 28.1MB. Max. memory is 16.1GB. * Witness Printer took 24.58ms. Allocated memory is still 132.1MB. Free memory was 105.8MB in the beginning and 103.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, N=1] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] b[0] = 1 [L32] a[0] = 1 [L34] i=1 VAL [a={-1:0}, b={-2:0}, i=1, N=1] [L34] COND FALSE !(i